MAX4370ESA+T【PDF 13/16 页】IC CNTRLR HOT-SWAP 8-SOIC

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录43

9页 10页 11页 12页 [13页]14页 15页 16页

The actual turn-on time is determined by the longer of

the two timings of Case A and Case B. Set the start-up

timer (t

START

) at 2 ?/SPAN> t

or longer to guarantee enough

time for the output voltage to settle; also take into con-

sideration device parameter variation.

Slow Comparator Response Time (C

SPD

)

The slow comparator threshold is set at 50mV, and its

response time is determined by the external capacitor

connected to CSPD (Figure 8).

A minimum response time of 20祍 (typ) is achieved by

leaving this pin floating. This time is determined inter -

nally and is not affected by stray capacitance at CSPD

(up to 100pF).

Set the slow comparator response time to be longer

than the normal operation load transients.

ON Comparator

The ON/OFF function of the MAX4370 is controlled by

the ON comparator. This is a precision voltage com -

parator that can be used for temperature monitoring

(Figure 9) or as an additional undervoltage lockout. The

comparator threshold voltage is set at 0.6V with a 3mV

typical hysteresis.

The ON comparator initiates start-up when its input volt-

age (V

) rises above the threshold voltage, and turns

off the MOSFET when the voltage falls below the

threshold. The ON comparator is also used to reset the

MAX4370 after a fault condition.

The ON comparator input and the STAT output can be

pulled to voltages up to 14V independently of V

In some applications, it is useful to use connectors with

staggered leads. In Figure 10, the ON pin forces the

removable board to be powered up only when all con-

nections are made.

Current-Regulating Hot-Swap Controller with

DualSpeed/BiLevel Fault Protection

______________________________________________________________________________________ 13

0.01

0.1

100

1000

SPD

(nF)

1000

0.1

0.01

100

CSPD

(ms) = 0.2 ?/SPAN> C

SPD

(nF)

Figure 8. Slow Comparator Response Time vs. C

SPD

LOGIC

CONTROL

REF

NTC

R1 = R2 ?/SPAN> (V

REF

/ O.6 - 1)

R2 = VALUE OF THE NTC RESISTOR AT THE LIMIT TEMPERATURE

REF

= ANY REFERENCE VOLTAGE AVAILABLE OR V

0.6V

Figure 9. Temperature Monitoring and Protection

BACKPLANE

10k

RESET

MAX4370

VSEN GATE

REMOVABLE

CARD

Figure 10. Fail-Safe Connector

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式